Try 6 months of this "fundamental" training (not base work, fundamental work) and get back to us:
1.) Increase your mileage by 10-15 miles per week over the 6 month period (as in, 6 months from now be averaging 10-15 miles per week than you are right now). This is a very slow progression, and for a reason. Every 4th week should be a little less.
2.) Lift weights and do lots of core work.
3.) Structure your week as outlined below:
MONDAY: 15% of weekly mileage today (do a morning run if necessary to achieve that total). Do all this on the same hill, just go longer each time.
1. 2 months of: Warm-up (jog, a few strides, form drills, a few faster strides) , 8-15 x 150-200 uphill at a medium grade on a hard surface at 3k-5k effort, jog down for recovery, cool down.
2. 2 months of: Warm-up, 8-10 x 300-400 uphill at 3k-5k effort jog down recovery, cool down.
3. 2 months of: Warm-up, 5-7 x 600-800 uphill at 3k-5k effort jog down recovery, cool down.
TUESDAY: 15% of weekly mileage, including at the end of the run: a few light strides at 5k speed, form drills, light plyos, 6 x 100m at 800m speed (1 minute recovery), short cool down jog.
WEDNESDAY: 15% of weekly mileage today (do a morning run if necessary). Alternate these 3 each week.
a.) Warm-up (jog, a few strides, form drills, a few faster strides), 4-7 miles at 5:50-6:00 pace (go longer as the months pass), cool down.
b.) Warm-up, 6-8 x 1000 in 3:45 to 3:30 pace (go faster as the months pass) with 200 jog rests, cool down.
c.) Warm-up, 6-8 x 800 in 2:35 to 2:25 (go faster as the months pass) with 400 jog rests, cool down.
THUR: 10% of weekly mileage slow (7:30-8:00 pace).
FRI: 15% of weekly mileage today (do morning run if necessary to achieve this). Alternate these 3 each week.
a.) Warm-up (jog, a few strides, form drills, light plyos, a few more strides), 10 x 60m at 95% full speed (walk back very slowly for recovery), very long cool down at 7:00-7:30 pace.
b.) Warm-up, 8-10 x 100 in 13.0 with a 300m slow jog, long cool down at 7:00-7:30 pace.
c.) Warm-up, 6 x 100-150 uphill at 85-90% full speed with a very slow jog down for recovery, very long cool down.
SAT: 20% of mileage progressively going from 7:30 down to 6:00 pace the last mile or two.
SUN: 10% of mileage slow (7:30-8:00 pace)